COM port on ubuntu vs windows

[Iliar Rabet]

Hi there,

I have compiled the hello world example of Zephyr and flashed my NRF 5340 DK successfully. 
Now when I want to use the COM port to see the results on my ubuntu I can't see anything black screen. 
The same configuration (baud rate/parity/XON and XOFF) on putty works fine for a windows machine and I see "hello world" on the COM port.
I also tried "screen" and "picocom" but still same results.

Am I missing anything?

Best regards,
Iliar Rabet

[Iliar Rabet]

By the way, I am using the application core. So it should work fine on ttyACM0 according to this link
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_nrf5340.html#getting-logging-output

[Elfving]

Hello Iliar, sorry about the wait.

I just tried it myself using the nRF Serial Terminal that comes with the VSC extension on an Ubuntu, which worked fine. It connected to /dev/ttyACM1. Picocom works as well.

Now when I want to use the COM port to see the results on my ubuntu I can't see anything black screen. 

Could you expand a bit on this? There is nothing showing up in your serial terminal? Did you try pushing the reset button on the DK while checking?

Regards,

Elfving

[Iliar Rabet]

Hi Elfving,

Thanks for your response.
Yes, I see nothing on my terminal but when I switch to Windows I see "hello world" on the terminal.
Nothing changes when I push the reset button as well. 
Just tried with /dev/ttyACM0 ttyACM1 and also ACM2 no difference.
Also tried connecting the Dev Kit to a raspberry still not working. 

[Elfving]

That is odd.

Could you try the nRF Terminal from the VSC extention too? Are you seeing the JLINK Mass storage device being accessible when you plug it in?

Regards,

Elfving

[Iliar Rabet]

The Mass storage shows up like this:

Using the VSC extension I see nothing again:

[Elfving]

With the DK connected, are you seeing it appearing under the "Connected Devices" menu? If not could you try pressing the Refresh button?

Iliar Rabet said:

Using the VSC extension I see nothing again:

What happens if you press the restart terminal button which I've circled below?

Regards,

Elfving

[Iliar Rabet]

I see the devices and VCOMs say they are connected but I don't see the output that I see on windows

[Elfving]

Have you tried using another USB port? Are you sure that there are no other serial terminals or programs currently using this port, which hinders other terminals from connecting to it?

Regards,

Elfving

[Iliar Rabet]

Thanks, Elfving.
I tried another USB port and it's working fine now.